| // This file was procedurally generated from the following sources: |
| // - src/dstr-assignment-for-await/array-elem-init-fn-name-cover.case |
| // - src/dstr-assignment-for-await/default/async-gen-decl.template |
| /*--- |
| description: Assignment of function `name` attribute (CoverParenthesizedExpression) (for-await-of statement in an async generator declaration) |
| esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation |
| features: [destructuring-binding, async-iteration] |
| flags: [generated, async] |
| includes: [propertyHelper.js] |
| info: | |
| IterationStatement : |
| for await ( LeftHandSideExpression of AssignmentExpression ) Statement |
| |
| 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », |
| AssignmentExpression, iterate). |
| 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, |
| keyResult, assignment, labelSet). |
| |
| 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation |
| |
| [...] |
| 5. If destructuring is true and if lhsKind is assignment, then |
| a. Assert: lhs is a LeftHandSideExpression. |
| b. Let assignmentPattern be the parse of the source text corresponding to |
| lhs using AssignmentPattern as the goal symbol. |
| [...] |
| |
| AssignmentElement[Yield] : DestructuringAssignmentTarget Initializeropt |
| [...] 7. If Initializer is present and value is undefined and |
| IsAnonymousFunctionDefinition(Initializer) and IsIdentifierRef of |
| DestructuringAssignmentTarget are both true, then |
| a. Let hasNameProperty be ? HasOwnProperty(v, "name"). |
| b. If hasNameProperty is false, perform SetFunctionName(v, GetReferencedName(lref)). |
| |
| ---*/ |
| let xCover, cover; |
| |
| let iterCount = 0; |
| async function * fn() { |
| for await ([ xCover = (0, function() {}), cover = (function() {}) ] of [[]]) { |
| assert(xCover.name !== 'xCover'); |
| |
| verifyProperty(cover, 'name', { |
| enumerable: false, |
| writable: false, |
| configurable: true, |
| value: 'cover' |
| }); |
| |
| iterCount += 1; |
| } |
| } |
| |
| let promise = fn().next(); |
| |
| promise |
| .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) |
| .then($DONE, $DONE); |